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Chemistry 2011
Q. 6. Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be
(1) 25.00 u (2) 50.00 u
(3) 12.25 u (4) 6.50 u
Sol .
Answer : (3)
Q. 7. Which of the following is correct option for free expansion of an ideal gas under adiabatic condition?
Sol:
For an ideal gas, for free expansion q = 0; ΔT = 0 & w = 0
Answer : (4)
Q. 8. For the reaction 
the equilibrium constant is K1. The equilibrium constant is K2 for the reaction 
What is K for the reaction 
'
Sol:
Answer : (4)
Q. 9. If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?
Sol:
x/m = P × T is the incorrect relation
Answer : (1)
Q.10. If the enthalpy change for the transition of liquid water to steam is 30 kJ 
at 27°C, the entropy change for the process would be
Sol:
Answer : (1)